diff --git a/core/io/resource_loader.cpp b/core/io/resource_loader.cpp
index 957f22d855e..03505227204 100644
--- a/core/io/resource_loader.cpp
+++ b/core/io/resource_loader.cpp
@@ -732,7 +732,7 @@ String ResourceLoader::_path_remap(const String &p_path, bool *r_translation_rem
 		bool near_match = false;
 
 		for (int i = 0; i < res_remaps.size(); i++) {
-			int split = res_remaps[i].find_last(":");
+			int split = res_remaps[i].rfind(":");
 			if (split == -1) {
 				continue;
 			}
diff --git a/core/project_settings.cpp b/core/project_settings.cpp
index ecff1becb71..6c6e2dc2f1c 100644
--- a/core/project_settings.cpp
+++ b/core/project_settings.cpp
@@ -99,7 +99,7 @@ String ProjectSettings::localize_path(const String &p_path) const {
 	} else {
 		memdelete(dir);
 
-		int sep = path.find_last("/");
+		int sep = path.rfind("/");
 		if (sep == -1) {
 			return "res://" + path;
 		};
diff --git a/core/ustring.cpp b/core/ustring.cpp
index 6eed672bb23..fa7fdbbc65e 100644
--- a/core/ustring.cpp
+++ b/core/ustring.cpp
@@ -2443,15 +2443,7 @@ String String::substr(int p_from, int p_chars) const {
 }
 
 int String::find_last(const String &p_str) const {
-	int pos = -1;
-	int findfrom = 0;
-	int findres = -1;
-	while ((findres = find(p_str, findfrom)) != -1) {
-		pos = findres;
-		findfrom = pos + 1;
-	}
-
-	return pos;
+	return rfind(p_str);
 }
 
 int String::find(const String &p_str, int p_from) const {
@@ -4062,7 +4054,7 @@ String String::get_base_dir() const {
 }
 
 String String::get_file() const {
-	int sep = MAX(find_last("/"), find_last("\\"));
+	int sep = MAX(rfind("/"), rfind("\\"));
 	if (sep == -1) {
 		return *this;
 	}
@@ -4071,8 +4063,8 @@ String String::get_file() const {
 }
 
 String String::get_extension() const {
-	int pos = find_last(".");
-	if (pos < 0 || pos < MAX(find_last("/"), find_last("\\"))) {
+	int pos = rfind(".");
+	if (pos < 0 || pos < MAX(rfind("/"), rfind("\\"))) {
 		return "";
 	}
 
@@ -4171,8 +4163,8 @@ String String::validate_node_name() const {
 }
 
 String String::get_basename() const {
-	int pos = find_last(".");
-	if (pos < 0 || pos < MAX(find_last("/"), find_last("\\"))) {
+	int pos = rfind(".");
+	if (pos < 0 || pos < MAX(rfind("/"), rfind("\\"))) {
 		return *this;
 	}
 
diff --git a/editor/animation_track_editor.cpp b/editor/animation_track_editor.cpp
index d802c13856a..22713baa1d8 100644
--- a/editor/animation_track_editor.cpp
+++ b/editor/animation_track_editor.cpp
@@ -3639,7 +3639,7 @@ void AnimationTrackEditor::insert_node_value_key(Node *p_node, const String &p_p
 			if (track_path == np) {
 				value = p_value; //all good
 			} else {
-				int sep = track_path.find_last(":");
+				int sep = track_path.rfind(":");
 				if (sep != -1) {
 					String base_path = track_path.substr(0, sep);
 					if (base_path == np) {
@@ -3738,7 +3738,7 @@ void AnimationTrackEditor::insert_value_key(const String &p_property, const Vari
 				value = p_value; //all good
 			} else {
 				String tpath = animation->track_get_path(i);
-				int index = tpath.find_last(":");
+				int index = tpath.rfind(":");
 				if (NodePath(tpath.substr(0, index + 1)) == np) {
 					String subindex = tpath.substr(index + 1, tpath.length() - index);
 					value = p_value.get(subindex);
diff --git a/editor/editor_asset_installer.cpp b/editor/editor_asset_installer.cpp
index c7952806e36..b017d0c2a3e 100644
--- a/editor/editor_asset_installer.cpp
+++ b/editor/editor_asset_installer.cpp
@@ -224,7 +224,7 @@ void EditorAssetInstaller::open(const String &p_path, int p_depth) {
 			isdir = true;
 		}
 
-		int pp = path.find_last("/");
+		int pp = path.rfind("/");
 
 		TreeItem *parent;
 		if (pp == -1) {
diff --git a/editor/editor_feature_profile.cpp b/editor/editor_feature_profile.cpp
index 30bba1e0bad..60f5723458c 100644
--- a/editor/editor_feature_profile.cpp
+++ b/editor/editor_feature_profile.cpp
@@ -359,7 +359,7 @@ void EditorFeatureProfileManager::_update_profile_list(const String &p_select_pr
 		}
 
 		if (!d->current_is_dir()) {
-			int last_pos = f.find_last(".profile");
+			int last_pos = f.rfind(".profile");
 			if (last_pos != -1) {
 				profiles.push_back(f.substr(0, last_pos));
 			}
diff --git a/editor/editor_file_dialog.cpp b/editor/editor_file_dialog.cpp
index 4afc10a5158..afcc1ec600e 100644
--- a/editor/editor_file_dialog.cpp
+++ b/editor/editor_file_dialog.cpp
@@ -944,7 +944,7 @@ void EditorFileDialog::set_current_file(const String &p_file) {
 	file->set_text(p_file);
 	update_dir();
 	invalidate();
-	int lp = p_file.find_last(".");
+	int lp = p_file.rfind(".");
 	if (lp != -1) {
 		file->select(0, lp);
 		file->grab_focus();
@@ -958,7 +958,7 @@ void EditorFileDialog::set_current_path(const String &p_path) {
 	if (!p_path.size()) {
 		return;
 	}
-	int pos = MAX(p_path.find_last("/"), p_path.find_last("\\"));
+	int pos = MAX(p_path.rfind("/"), p_path.rfind("\\"));
 	if (pos == -1) {
 		set_current_file(p_path);
 	} else {
diff --git a/editor/editor_folding.cpp b/editor/editor_folding.cpp
index 80c805e91ff..22e07aa103d 100644
--- a/editor/editor_folding.cpp
+++ b/editor/editor_folding.cpp
@@ -249,7 +249,7 @@ void EditorFolding::_do_object_unfolds(Object *p_object, Set<RES> &resources) {
 					}
 				}
 			} else { //path
-				int last = E->get().name.find_last("/");
+				int last = E->get().name.rfind("/");
 				if (last != -1) {
 					bool can_revert = EditorPropertyRevert::can_property_revert(p_object, E->get().name);
 					if (can_revert) {
diff --git a/editor/editor_inspector.cpp b/editor/editor_inspector.cpp
index 8a8e5052561..78c9471698a 100644
--- a/editor/editor_inspector.cpp
+++ b/editor/editor_inspector.cpp
@@ -1544,7 +1544,7 @@ void EditorInspector::update_tree() {
 			basename = group + "/" + basename;
 		}
 
-		String name = (basename.find("/") != -1) ? basename.right(basename.find_last("/") + 1) : basename;
+		String name = (basename.find("/") != -1) ? basename.right(basename.rfind("/") + 1) : basename;
 
 		if (capitalize_paths) {
 			int dot = name.find(".");
@@ -1559,7 +1559,7 @@ void EditorInspector::update_tree() {
 			}
 		}
 
-		String path = basename.left(basename.find_last("/"));
+		String path = basename.left(basename.rfind("/"));
 
 		if (use_filter && filter != "") {
 			String cat = path;
diff --git a/editor/filesystem_dock.cpp b/editor/filesystem_dock.cpp
index 25c7dc3b5f5..8d75b0275ea 100644
--- a/editor/filesystem_dock.cpp
+++ b/editor/filesystem_dock.cpp
@@ -1819,7 +1819,7 @@ void FileSystemDock::_file_option(int p_option, const Vector<String> &p_selected
 						String name = to_rename.path.get_file();
 						rename_dialog->set_title(TTR("Renaming file:") + " " + name);
 						rename_dialog_text->set_text(name);
-						rename_dialog_text->select(0, name.find_last("."));
+						rename_dialog_text->select(0, name.rfind("."));
 					} else {
 						String name = to_rename.path.substr(0, to_rename.path.length() - 1).get_file();
 						rename_dialog->set_title(TTR("Renaming folder:") + " " + name);
@@ -1863,7 +1863,7 @@ void FileSystemDock::_file_option(int p_option, const Vector<String> &p_selected
 					String name = to_duplicate.path.get_file();
 					duplicate_dialog->set_title(TTR("Duplicating file:") + " " + name);
 					duplicate_dialog_text->set_text(name);
-					duplicate_dialog_text->select(0, name.find_last("."));
+					duplicate_dialog_text->select(0, name.rfind("."));
 				} else {
 					String name = to_duplicate.path.substr(0, to_duplicate.path.length() - 1).get_file();
 					duplicate_dialog->set_title(TTR("Duplicating folder:") + " " + name);
diff --git a/editor/plugins/animation_player_editor_plugin.cpp b/editor/plugins/animation_player_editor_plugin.cpp
index 166a09cacad..0ac9a1c3bb3 100644
--- a/editor/plugins/animation_player_editor_plugin.cpp
+++ b/editor/plugins/animation_player_editor_plugin.cpp
@@ -722,11 +722,11 @@ void AnimationPlayerEditor::_dialog_action(String p_file) {
 			Ref<Resource> res = ResourceLoader::load(p_file, "Animation");
 			ERR_FAIL_COND_MSG(res.is_null(), "Cannot load Animation from file '" + p_file + "'.");
 			ERR_FAIL_COND_MSG(!res->is_class("Animation"), "Loaded resource from file '" + p_file + "' is not Animation.");
-			if (p_file.find_last("/") != -1) {
-				p_file = p_file.substr(p_file.find_last("/") + 1, p_file.length());
+			if (p_file.rfind("/") != -1) {
+				p_file = p_file.substr(p_file.rfind("/") + 1, p_file.length());
 			}
-			if (p_file.find_last("\\") != -1) {
-				p_file = p_file.substr(p_file.find_last("\\") + 1, p_file.length());
+			if (p_file.rfind("\\") != -1) {
+				p_file = p_file.substr(p_file.rfind("\\") + 1, p_file.length());
 			}
 
 			if (p_file.find(".") != -1) {
diff --git a/editor/project_manager.cpp b/editor/project_manager.cpp
index cc46fe79e75..19469284646 100644
--- a/editor/project_manager.cpp
+++ b/editor/project_manager.cpp
@@ -299,7 +299,7 @@ private:
 			// If the project name is empty or default, infer the project name from the selected folder name
 			if (project_name->get_text().strip_edges() == "" || project_name->get_text().strip_edges() == TTR("New Game Project")) {
 				sp = sp.replace("\\", "/");
-				int lidx = sp.find_last("/");
+				int lidx = sp.rfind("/");
 
 				if (lidx != -1) {
 					sp = sp.substr(lidx + 1, sp.length()).capitalize();
diff --git a/editor/project_settings_editor.cpp b/editor/project_settings_editor.cpp
index f089abf67c7..85ffa50b852 100644
--- a/editor/project_settings_editor.cpp
+++ b/editor/project_settings_editor.cpp
@@ -1655,7 +1655,7 @@ void ProjectSettingsEditor::_update_translations() {
 				PoolStringArray selected = remaps[keys[i]];
 				for (int j = 0; j < selected.size(); j++) {
 					String s2 = selected[j];
-					int qp = s2.find_last(":");
+					int qp = s2.rfind(":");
 					String path = s2.substr(0, qp);
 					String locale = s2.substr(qp + 1, s2.length());
 
diff --git a/editor/script_create_dialog.cpp b/editor/script_create_dialog.cpp
index 6d1af0372d4..b6f997ad942 100644
--- a/editor/script_create_dialog.cpp
+++ b/editor/script_create_dialog.cpp
@@ -75,7 +75,7 @@ void ScriptCreateDialog::_notification(int p_what) {
 
 void ScriptCreateDialog::_path_hbox_sorted() {
 	if (is_visible()) {
-		int filename_start_pos = initial_bp.find_last("/") + 1;
+		int filename_start_pos = initial_bp.rfind("/") + 1;
 		int filename_end_pos = initial_bp.length();
 
 		if (!is_built_in) {
@@ -554,7 +554,7 @@ void ScriptCreateDialog::_file_selected(const String &p_file) {
 		_path_changed(p);
 
 		String filename = p.get_file().get_basename();
-		int select_start = p.find_last(filename);
+		int select_start = p.rfind(filename);
 		file_path->select(select_start, select_start + filename.length());
 		file_path->set_cursor_position(select_start + filename.length());
 		file_path->grab_focus();
diff --git a/main/main.cpp b/main/main.cpp
index 29d06e84e06..e0df6794ec4 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -772,7 +772,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		} else if (I->get().ends_with("project.godot")) {
 			String path;
 			String file = I->get();
-			int sep = MAX(file.find_last("/"), file.find_last("\\"));
+			int sep = MAX(file.rfind("/"), file.rfind("\\"));
 			if (sep == -1) {
 				path = ".";
 			} else {
@@ -944,7 +944,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 		ScriptDebuggerRemote *sdr = memnew(ScriptDebuggerRemote);
 		uint16_t debug_port = 6007;
 		if (debug_host.find(":") != -1) {
-			int sep_pos = debug_host.find_last(":");
+			int sep_pos = debug_host.rfind(":");
 			debug_port = debug_host.substr(sep_pos + 1, debug_host.length()).to_int();
 			debug_host = debug_host.substr(0, sep_pos);
 		}
@@ -967,7 +967,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 		for (int i = 0; i < breakpoints.size(); i++) {
 			String bp = breakpoints[i];
-			int sp = bp.find_last(":");
+			int sp = bp.rfind(":");
 			ERR_CONTINUE_MSG(sp == -1, "Invalid breakpoint: '" + bp + "', expected file:line format.");
 
 			script_debugger->insert_breakpoint(bp.substr(sp + 1, bp.length()).to_int(), bp.substr(0, sp));
@@ -2034,7 +2034,7 @@ bool Main::start() {
 						local_game_path = "res://" + local_game_path;
 
 					} else {
-						int sep = local_game_path.find_last("/");
+						int sep = local_game_path.rfind("/");
 
 						if (sep == -1) {
 							DirAccess *da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
diff --git a/modules/gdnative/gdnative/string.cpp b/modules/gdnative/gdnative/string.cpp
index 31bc5b23872..178b4619dd1 100644
--- a/modules/gdnative/gdnative/string.cpp
+++ b/modules/gdnative/gdnative/string.cpp
@@ -275,7 +275,7 @@ godot_int GDAPI godot_string_find_last(const godot_string *p_self, godot_string
 	const String *self = (const String *)p_self;
 	String *what = (String *)&p_what;
 
-	return self->find_last(*what);
+	return self->rfind(*what);
 }
 
 godot_string GDAPI godot_string_format(const godot_string *p_self, const godot_variant *p_values) {
diff --git a/platform/android/export/export_plugin.cpp b/platform/android/export/export_plugin.cpp
index 7664fc255ae..05ec6571b0d 100644
--- a/platform/android/export/export_plugin.cpp
+++ b/platform/android/export/export_plugin.cpp
@@ -1406,7 +1406,7 @@ void EditorExportPlatformAndroid::_fix_resources(const Ref<EditorExportPreset> &
 				str = get_project_name(package_name);
 
 			} else {
-				String lang = str.substr(str.find_last("-") + 1, str.length()).replace("-", "_");
+				String lang = str.substr(str.rfind("-") + 1, str.length()).replace("-", "_");
 				String prop = "application/config/name_" + lang;
 				if (ProjectSettings::get_singleton()->has_setting(prop)) {
 					str = ProjectSettings::get_singleton()->get(prop);
diff --git a/scene/gui/file_dialog.cpp b/scene/gui/file_dialog.cpp
index c294e492180..ae58e0b41e6 100644
--- a/scene/gui/file_dialog.cpp
+++ b/scene/gui/file_dialog.cpp
@@ -601,7 +601,7 @@ void FileDialog::set_current_file(const String &p_file) {
 	file->set_text(p_file);
 	update_dir();
 	invalidate();
-	int lp = p_file.find_last(".");
+	int lp = p_file.rfind(".");
 	if (lp != -1) {
 		file->select(0, lp);
 		if (file->is_inside_tree() && !get_tree()->is_node_being_edited(file)) {
@@ -613,7 +613,7 @@ void FileDialog::set_current_path(const String &p_path) {
 	if (!p_path.size()) {
 		return;
 	}
-	int pos = MAX(p_path.find_last("/"), p_path.find_last("\\"));
+	int pos = MAX(p_path.rfind("/"), p_path.rfind("\\"));
 	if (pos == -1) {
 		set_current_file(p_path);
 	} else {