diff --git a/backend/config/config_manager.py b/backend/config/config_manager.py
index fc65e257d..bba192195 100644
--- a/backend/config/config_manager.py
+++ b/backend/config/config_manager.py
@@ -41,6 +41,7 @@ class Config:
     PLATFORMS_VERSIONS: dict[str, str]
     ROMS_FOLDER_NAME: str
     FIRMWARE_FOLDER_NAME: str
+    EJS_CORE_OPTIONS: dict[str, dict[str, str]]
     HIGH_PRIO_STRUCTURE_PATH: str
 
     def __init__(self, **entries):
@@ -149,6 +150,7 @@ class ConfigManager:
             FIRMWARE_FOLDER_NAME=pydash.get(
                 self._raw_config, "filesystem.firmware_folder", "bios"
             ),
+            EJS_CORE_OPTIONS=pydash.get(self._raw_config, "emulatorjs", {}),
         )
 
     def _validate_config(self):
@@ -231,6 +233,17 @@ class ConfigManager:
             )
             sys.exit(3)
 
+        if not isinstance(self.config.EJS_CORE_OPTIONS, dict):
+            log.critical("Invalid config.yml: emulatorjs must be a dictionary")
+            sys.exit(3)
+        else:
+            for core, options in self.config.EJS_CORE_OPTIONS.items():
+                if not isinstance(options, dict):
+                    log.critical(
+                        f"Invalid config.yml: emulatorjs.{core} must be a dictionary"
+                    )
+                    sys.exit(3)
+
     def get_config(self) -> Config:
         with open(self.config_file) as config_file:
             self._raw_config = yaml.load(config_file, Loader=SafeLoader) or {}
diff --git a/backend/endpoints/configs.py b/backend/endpoints/configs.py
index 67f92e2e2..eef5fc9bb 100644
--- a/backend/endpoints/configs.py
+++ b/backend/endpoints/configs.py
@@ -35,6 +35,7 @@ def get_config() -> ConfigResponse:
             EXCLUDED_MULTI_PARTS_FILES=cfg.EXCLUDED_MULTI_PARTS_FILES,
             PLATFORMS_BINDING=cfg.PLATFORMS_BINDING,
             PLATFORMS_VERSIONS=cfg.PLATFORMS_VERSIONS,
+            EJS_CORE_OPTIONS=cfg.EJS_CORE_OPTIONS,
         )
     except ConfigNotReadableException as exc:
         log.critical(exc.message)
diff --git a/backend/endpoints/responses/config.py b/backend/endpoints/responses/config.py
index 0b537501c..3fcb28b40 100644
--- a/backend/endpoints/responses/config.py
+++ b/backend/endpoints/responses/config.py
@@ -10,3 +10,4 @@ class ConfigResponse(TypedDict):
     EXCLUDED_MULTI_PARTS_FILES: list[str]
     PLATFORMS_BINDING: dict[str, str]
     PLATFORMS_VERSIONS: dict[str, str]
+    EJS_CORE_OPTIONS: dict[str, dict[str, str]]
diff --git a/backend/tests/config/fixtures/config/config.yml b/backend/tests/config/fixtures/config/config.yml
index 72a368b23..7bcce587a 100644
--- a/backend/tests/config/fixtures/config/config.yml
+++ b/backend/tests/config/fixtures/config/config.yml
@@ -29,3 +29,9 @@ system:
 filesystem:
   roms_folder: "ROMS"
   firmware_folder: "BIOS"
+
+emulatorjs:
+  parallel_n64:
+    vsync: disable
+  snes9x:
+    snes9x_region: ntsc
diff --git a/backend/tests/config/test_config_loader.py b/backend/tests/config/test_config_loader.py
index ab8ffdad0..fdeb2c5bf 100644
--- a/backend/tests/config/test_config_loader.py
+++ b/backend/tests/config/test_config_loader.py
@@ -19,6 +19,10 @@ def test_config_loader():
     assert loader.config.PLATFORMS_VERSIONS == {"naomi": "arcade"}
     assert loader.config.ROMS_FOLDER_NAME == "ROMS"
     assert loader.config.FIRMWARE_FOLDER_NAME == "BIOS"
+    assert loader.config.EJS_CORE_OPTIONS == {
+        "parallel_n64": {"vsync": "disable"},
+        "snes9x": {"snes9x_region": "ntsc"},
+    }
 
 
 def test_empty_config_loader():
@@ -38,3 +42,4 @@ def test_empty_config_loader():
     assert loader.config.PLATFORMS_VERSIONS == {}
     assert loader.config.ROMS_FOLDER_NAME == "roms"
     assert loader.config.FIRMWARE_FOLDER_NAME == "bios"
+    assert loader.config.EJS_CORE_OPTIONS == {}
diff --git a/examples/config.example.yml b/examples/config.example.yml
index d4f7656b2..10d5be04c 100644
--- a/examples/config.example.yml
+++ b/examples/config.example.yml
@@ -46,3 +46,12 @@ system:
 
 # The folder name where your roms are located
 filesystem: {} # { roms_folder: 'roms' } For example if your folder structure is /home/user/library/roms_folder
+
+# EmulatorJS per-core options
+emulatorjs:
+  parallel_n64: # Use the exact core name
+    vsync: disable
+  snes9x:
+    snes9x_region: ntsc
+  default: # These settings apply to all cores
+    fps: show
diff --git a/frontend/src/__generated__/models/ConfigResponse.ts b/frontend/src/__generated__/models/ConfigResponse.ts
index 387c5b00f..09718a036 100644
--- a/frontend/src/__generated__/models/ConfigResponse.ts
+++ b/frontend/src/__generated__/models/ConfigResponse.ts
@@ -11,5 +11,6 @@ export type ConfigResponse = {
     EXCLUDED_MULTI_PARTS_FILES: Array<string>;
     PLATFORMS_BINDING: Record<string, string>;
     PLATFORMS_VERSIONS: Record<string, string>;
+    EJS_CORE_OPTIONS: Record<string, Record<string, string>>;
 };
 
diff --git a/frontend/src/components/Settings/UserInterface/LanguageSelector.vue b/frontend/src/components/Settings/UserInterface/LanguageSelector.vue
index 6e64c09c5..4ace8acee 100644
--- a/frontend/src/components/Settings/UserInterface/LanguageSelector.vue
+++ b/frontend/src/components/Settings/UserInterface/LanguageSelector.vue
@@ -1,5 +1,4 @@
 <script setup lang="ts">
-import { ref } from "vue";
 import { useI18n } from "vue-i18n";
 import languageStore from "@/stores/language";
 import { storeToRefs } from "pinia";
diff --git a/frontend/src/stores/config.ts b/frontend/src/stores/config.ts
index 47c83be1d..e3ac454c6 100644
--- a/frontend/src/stores/config.ts
+++ b/frontend/src/stores/config.ts
@@ -20,6 +20,7 @@ const defaultConfig = {
   EXCLUDED_MULTI_PARTS_FILES: [],
   PLATFORMS_BINDING: {},
   PLATFORMS_VERSIONS: {},
+  EJS_CORE_OPTIONS: {},
 } as ConfigResponse;
 
 export default defineStore("config", {
@@ -66,6 +67,14 @@ export default defineStore("config", {
     isExclusionType(type: string): type is ExclusionTypes {
       return Object.keys(this.config).includes(type);
     },
+    getEJSCoreOptions(core: string | null): Record<string, string | boolean> {
+      const defaultOptions = this.config.EJS_CORE_OPTIONS["default"];
+      if (!core) return defaultOptions;
+      return {
+        ...defaultOptions,
+        ...this.config.EJS_CORE_OPTIONS[core],
+      };
+    },
     reset() {},
   },
 });
diff --git a/frontend/src/views/Player/EmulatorJS/Player.vue b/frontend/src/views/Player/EmulatorJS/Player.vue
index fa991110c..a69b93c14 100644
--- a/frontend/src/views/Player/EmulatorJS/Player.vue
+++ b/frontend/src/views/Player/EmulatorJS/Player.vue
@@ -2,6 +2,7 @@
 import type { FirmwareSchema, SaveSchema, StateSchema } from "@/__generated__";
 import { saveApi as api } from "@/services/api/save";
 import storeRoms, { type DetailedRom } from "@/stores/roms";
+import storeConfig from "@/stores/config";
 import {
   areThreadsRequiredForEJSCore,
   getSupportedEJSCores,
@@ -22,11 +23,14 @@ import {
 import type { Emitter } from "mitt";
 import type { Events } from "@/types/emitter";
 import storePlaying from "@/stores/playing";
+import languageStore from "@/stores/language";
 import { storeToRefs } from "pinia";
 
 const INVALID_CHARS_REGEX = /[#<$+%>!`&*'|{}/\\?"=@:^\r\n]/gi;
 
 const romsStore = storeRoms();
+const configStore = storeConfig();
+
 const props = defineProps<{
   rom: DetailedRom;
   save: SaveSchema | null;
@@ -41,6 +45,8 @@ const theme = useTheme();
 const emitter = inject<Emitter<Events>>("emitter");
 const playingStore = storePlaying();
 const { playing, fullScreen } = storeToRefs(playingStore);
+const storeLanguage = languageStore();
+const { selectedLanguage } = storeToRefs(storeLanguage);
 
 // Declare global variables for EmulatorJS
 declare global {
@@ -67,6 +73,9 @@ declare global {
     EJS_threads: boolean;
     EJS_controlScheme: string | null;
     EJS_emulator: any; // eslint-disable-line @typescript-eslint/no-explicit-any
+    EJS_language: string;
+    EJS_disableAutoLang: boolean;
+    EJS_DEBUG_XX: boolean;
     EJS_Buttons: Record<string, boolean>;
     EJS_VirtualGamepadSettings: {};
     EJS_onGameStart: () => void;
@@ -108,15 +117,20 @@ window.EJS_Buttons = {
   // Disable the standard exit button to implement our own
   exitEmulation: false,
 };
-// Force saving saves and states to the browser
+const coreOptions = configStore.getEJSCoreOptions(props.core);
 window.EJS_defaultOptions = {
+  // Force saving saves and states to the browser
   "save-state-location": "browser",
   rewindEnabled: "enabled",
+  ...coreOptions,
 };
 // Set a valid game name
 window.EJS_gameName = romRef.value.fs_name_no_tags
   .replace(INVALID_CHARS_REGEX, "")
   .trim();
+window.EJS_language = selectedLanguage.value.value.replace("_", "-");
+window.EJS_disableAutoLang = true;
+window.EJS_DEBUG_XX = true;
 
 onMounted(() => {
   window.scrollTo(0, 0);
diff --git a/frontend/src/views/Player/EmulatorJS/utils.ts b/frontend/src/views/Player/EmulatorJS/utils.ts
index 31cedc7b0..ec5e88d2a 100644
--- a/frontend/src/views/Player/EmulatorJS/utils.ts
+++ b/frontend/src/views/Player/EmulatorJS/utils.ts
@@ -178,7 +178,7 @@ export function createExitEmulationButton(): HTMLButtonElement {
     '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 460 460"><path style="fill:none;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;stroke:rgb(255,255,255);stroke-opacity:1;stroke-miterlimit:4;" d="M 14.000061 7.636414 L 14.000061 4.5 C 14.000061 4.223877 13.776123 3.999939 13.5 3.999939 L 4.5 3.999939 C 4.223877 3.999939 3.999939 4.223877 3.999939 4.5 L 3.999939 19.5 C 3.999939 19.776123 4.223877 20.000061 4.5 20.000061 L 13.5 20.000061 C 13.776123 20.000061 14.000061 19.776123 14.000061 19.5 L 14.000061 16.363586 " transform="matrix(21.333333,0,0,21.333333,0,0)"></path><path style="fill:none;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;stroke:rgb(255,255,255);stroke-opacity:1;stroke-miterlimit:4;" d="M 9.999939 12 L 21 12 M 21 12 L 18.000366 8.499939 M 21 12 L 18 15.500061 " transform="matrix(21.333333,0,0,21.333333,0,0)"></path></svg>';
   const text = document.createElement("span");
   text.classList.add("ejs_menu_text", "ejs_menu_text_right");
-  text.innerText = "Exit Emulation";
+  text.innerText = "Quit";
   button.classList.add("ejs_menu_button");
   button.appendChild(svg);
   button.appendChild(text);