diff --git a/packages/core/src/db/schemas.ts b/packages/core/src/db/schemas.ts
index 6c26a7bc6..2f39c255a 100644
--- a/packages/core/src/db/schemas.ts
+++ b/packages/core/src/db/schemas.ts
@@ -568,6 +568,13 @@ export const UserDataSchema = z.object({
   cacheAndPlay: CacheAndPlaySchema.optional(),
 
   autoRemoveDownloads: z.boolean().optional(),
+
+  subdetect: z
+    .object({
+      enabled: z.boolean().optional(),
+      apiKey: z.string().optional(),
+    })
+    .optional(),
 });
 
 export type UserData = z.infer<typeof UserDataSchema>;
diff --git a/packages/core/src/main.ts b/packages/core/src/main.ts
index 0eb3496f4..5ba382ed5 100644
--- a/packages/core/src/main.ts
+++ b/packages/core/src/main.ts
@@ -18,6 +18,7 @@ import {
   AnimeDatabase,
   ParsedId,
   IdParser,
+  SubDetectService,
 } from './utils/index.js';
 import { Wrapper } from './wrapper.js';
 import { PresetManager } from './presets/index.js';
@@ -101,6 +102,7 @@ export class AIOStreams {
   private deduplicator: Deduplicator;
   private sorter: Sorter;
   private precomputer: Precomputer;
+  private subdetectService: SubDetectService;
 
   private addonInitialisationErrors: {
     addon: Addon | Preset;
@@ -121,6 +123,10 @@ export class AIOStreams {
     this.fetcher = new Fetcher(userData, this.filterer, this.precomputer);
     this.deduplicator = new Deduplicator(userData);
     this.sorter = new Sorter(userData);
+    this.subdetectService = new SubDetectService(
+      userData.subdetect?.apiKey,
+      userData.subdetect?.enabled ?? false
+    );
   }
 
   private setUserData(userData: UserData) {
@@ -2163,6 +2169,73 @@ export class AIOStreams {
     return { season, episode };
   }
 
+  private async _enrichWithSubDetectLanguages(
+    streams: ParsedStream[]
+  ): Promise<ParsedStream[]> {
+    if (!this.subdetectService.isEnabled()) {
+      return streams;
+    }
+
+    try {
+      const startTime = Date.now();
+
+      const releaseToStreams = new Map<string, ParsedStream[]>();
+
+      for (const stream of streams) {
+        const releaseName = stream.filename || stream.folderName;
+        if (releaseName) {
+          const existing = releaseToStreams.get(releaseName) || [];
+          existing.push(stream);
+          releaseToStreams.set(releaseName, existing);
+        }
+      }
+
+      if (releaseToStreams.size === 0) {
+        logger.debug('No valid release names found for SubDetect processing');
+        return streams;
+      }
+
+      // Get unique release names
+      const releaseNames = Array.from(releaseToStreams.keys());
+      logger.info(
+        `Processing ${releaseNames.length} unique release names with SubDetect`
+      );
+
+      const detectedLanguages =
+        await this.subdetectService.detectLanguages(releaseNames);
+
+      // Enrich streams with the languages
+      let enrichedCount = 0;
+      for (const [releaseName, languages] of detectedLanguages) {
+        const matchingStreams = releaseToStreams.get(releaseName);
+        if (matchingStreams && languages.length > 0) {
+          for (const stream of matchingStreams) {
+            if (stream.parsedFile) {
+              const existingLanguages = stream.parsedFile.languages || [];
+              const mergedLanguages = [
+                ...languages,
+                ...existingLanguages.filter((l) => !languages.includes(l)),
+              ];
+              stream.parsedFile.languages = mergedLanguages;
+              enrichedCount++;
+            }
+          }
+        }
+      }
+
+      logger.info(
+        `SubDetect enriched ${enrichedCount} streams with language info in ${Date.now() - startTime}ms`
+      );
+
+      return streams;
+    } catch (error) {
+      logger.error('SubDetect enrichment failed, continuing:', {
+        error: error instanceof Error ? error.message : String(error),
+      });
+      return streams;
+    }
+  }
+
   private async _processStreams(
     streams: ParsedStream[],
     context: StreamContext,
@@ -2180,6 +2253,9 @@ export class AIOStreams {
 
     processedStreams = await this.deduplicator.deduplicate(processedStreams);
 
+    processedStreams =
+      await this._enrichWithSubDetectLanguages(processedStreams);
+
     if (isMeta) {
       // Run preferred matching after filter
       await this.precomputer.precomputePreferred(processedStreams, context);
diff --git a/packages/core/src/parser/regex.ts b/packages/core/src/parser/regex.ts
index c5deba16a..669a7cb66 100644
--- a/packages/core/src/parser/regex.ts
+++ b/packages/core/src/parser/regex.ts
@@ -38,6 +38,7 @@ type PARSE_REGEX = {
   >;
   encodes: Omit<Record<(typeof constants.ENCODES)[number], RegExp>, 'Unknown'>;
   releaseGroup: RegExp;
+  sceneRelease: RegExp;
 };
 
 export const PARSE_REGEX: PARSE_REGEX = {
@@ -187,4 +188,6 @@ export const PARSE_REGEX: PARSE_REGEX = {
   },
   releaseGroup:
     /-[. ]?(?!\d+$|S\d+|\d+x|ep?\d+|[^[]+]$)([^\-. []+[^\-. [)\]\d][^\-. [)\]]*)(?:\[[\w.-]+])?(?=\)|[.-]+\w{2,4}$|$)/i,
+
+  sceneRelease: /-[a-zA-Z0-9]{2,}$/,
 };
diff --git a/packages/core/src/utils/index.ts b/packages/core/src/utils/index.ts
index a43095da9..21f03face 100644
--- a/packages/core/src/utils/index.ts
+++ b/packages/core/src/utils/index.ts
@@ -21,3 +21,5 @@ export * from './regex.js';
 export * from './general.js';
 export * from './seadex.js';
 export * from './nzb-proxy.js';
+
+export * from './subdetect.js';
diff --git a/packages/core/src/utils/subdetect.ts b/packages/core/src/utils/subdetect.ts
new file mode 100644
index 000000000..a579a73a2
--- /dev/null
+++ b/packages/core/src/utils/subdetect.ts
@@ -0,0 +1,145 @@
+import { makeRequest } from './http.js';
+import { createLogger } from './logger.js';
+import { FULL_LANGUAGE_MAPPING } from './languages.js';
+import { PARSE_REGEX } from '../parser/regex.js';
+
+const logger = createLogger('subdetect');
+
+const SUBDETECT_API_URL = 'https://subdetect.chromeknight.dev';
+const MAX_BATCH_SIZE = 20;
+
+/**
+ * Checks if a filename matches the scene release naming convention.
+ * Scene releases follow these rules:
+ * - No spaces (always dots as separators)
+ * - Must contain dots (Title.Year.Format pattern)
+ * - Ends with -GroupName (at least 2 characters)
+ */
+export function isSceneRelease(filename: string): boolean {
+  if (filename.includes(' ')) return false;
+  if (!filename.includes('.')) return false;
+  return PARSE_REGEX.sceneRelease.test(filename);
+}
+
+interface SubDetectResult {
+  release_name: string;
+  language_codes: string[];
+  nfo_found: boolean;
+}
+
+interface SubDetectProcessResponse {
+  results: SubDetectResult[];
+}
+
+export function convertISO6392ToLanguage(code: string): string | undefined {
+  const lang = FULL_LANGUAGE_MAPPING.find(
+    (language) => language.iso_639_2 === code.toLowerCase()
+  );
+  return lang?.english_name?.split('(')?.[0]?.trim();
+}
+
+export async function processReleases(
+  apiKey: string,
+  releases: string[]
+): Promise<Map<string, string[]>> {
+  const results = new Map<string, string[]>();
+
+  if (!apiKey || releases.length === 0) {
+    return results;
+  }
+
+  for (let i = 0; i < releases.length; i += MAX_BATCH_SIZE) {
+    const batch = releases.slice(i, i + MAX_BATCH_SIZE);
+
+    try {
+      const response = await makeRequest(`${SUBDETECT_API_URL}/api/process`, {
+        method: 'POST',
+        timeout: 30000,
+        headers: {
+          'Content-Type': 'application/json',
+          'X-API-Key': apiKey,
+        },
+        body: JSON.stringify({ releases: batch }),
+      });
+
+      if (response.status === 429) {
+        logger.warn(
+          'SubDetect rate limit exceeded, skipping remaining batches'
+        );
+        break;
+      }
+
+      if (response.status === 401) {
+        logger.error('SubDetect API key is invalid or expired');
+        break;
+      }
+
+      if (!response.ok) {
+        logger.error(`SubDetect API error: ${response.status}`);
+        continue;
+      }
+
+      const data = (await response.json()) as SubDetectProcessResponse;
+
+      for (const result of data.results) {
+        if (result.nfo_found && result.language_codes.length > 0) {
+          const languages = result.language_codes
+            .map((code) => convertISO6392ToLanguage(code))
+            .filter((lang): lang is string => lang !== undefined);
+
+          if (languages.length > 0) {
+            results.set(result.release_name, languages);
+          }
+        }
+      }
+    } catch (error) {
+      logger.error('Error processing releases with SubDetect:', {
+        error: error instanceof Error ? error.message : String(error),
+        batchSize: batch.length,
+      });
+    }
+  }
+
+  return results;
+}
+
+export class SubDetectService {
+  private apiKey: string | undefined;
+  private enabled: boolean;
+
+  constructor(apiKey?: string, enabled: boolean = false) {
+    this.apiKey = apiKey;
+    this.enabled = enabled;
+  }
+
+  isEnabled(): boolean {
+    return this.enabled && !!this.apiKey;
+  }
+
+  /**
+   * Process release names and return detected languages.
+   * Returns a map of release name -> detected languages.
+   */
+  async detectLanguages(
+    releaseNames: string[]
+  ): Promise<Map<string, string[]>> {
+    if (!this.isEnabled() || !this.apiKey) {
+      return new Map();
+    }
+
+    const uniqueReleases = [
+      ...new Set(releaseNames.filter((r) => r && isSceneRelease(r))),
+    ];
+
+    if (uniqueReleases.length === 0) {
+      logger.debug('No scene releases found to process with SubDetect');
+      return new Map();
+    }
+
+    logger.info(
+      `Processing ${uniqueReleases.length} scene releases with SubDetect API (filtered from ${releaseNames.length} total)`
+    );
+
+    return await processReleases(this.apiKey, uniqueReleases);
+  }
+}
diff --git a/packages/frontend/src/components/menu/miscellaneous.tsx b/packages/frontend/src/components/menu/miscellaneous.tsx
index ee4f2263e..443a481a4 100644
--- a/packages/frontend/src/components/menu/miscellaneous.tsx
+++ b/packages/frontend/src/components/menu/miscellaneous.tsx
@@ -1,4 +1,5 @@
 'use client';
+import { useState } from 'react';
 import { PageWrapper } from '../shared/page-wrapper';
 import { PageControls } from '../shared/page-controls';
 import { Switch } from '../ui/switch';
@@ -429,7 +430,83 @@ function Content() {
             />
           </SettingsCard>
         )}
+        {mode === 'pro' && <SubDetectCard />}
       </div>
     </>
   );
 }
+
+function SubDetectCard() {
+  const { userData, setUserData } = useUserData();
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleToggle = async (enabled: boolean) => {
+    setError(null);
+
+    // If enabling and no API key, generate one first
+    if (enabled && !userData.subdetect?.apiKey) {
+      setIsLoading(true);
+      try {
+        const response = await fetch(
+          'https://subdetect.chromeknight.dev/api/generate-key',
+          {
+            method: 'POST',
+            headers: {
+              'Content-Type': 'application/json',
+            },
+          }
+        );
+
+        if (!response.ok) {
+          throw new Error(`Failed to generate API key: ${response.status}`);
+        }
+
+        const data = await response.json();
+
+        setUserData((prev) => ({
+          ...prev,
+          subdetect: {
+            apiKey: data.api_key,
+            enabled: true,
+          },
+        }));
+      } catch (err) {
+        setError(
+          err instanceof Error ? err.message : 'Failed to enable SubDetect'
+        );
+      } finally {
+        setIsLoading(false);
+      }
+    } else {
+      setUserData((prev) => ({
+        ...prev,
+        subdetect: {
+          ...prev.subdetect,
+          enabled,
+        },
+      }));
+    }
+  };
+
+  return (
+    <SettingsCard
+      title="SubDetect - Subtitle Language Detection"
+      description="Automatically detect embedded subtitle languages from scene release NFO files. Languages detected by SubDetect take priority over parsed languages."
+    >
+      <Switch
+        label="Enable"
+        side="right"
+        disabled={isLoading}
+        value={userData.subdetect?.enabled ?? false}
+        onValueChange={handleToggle}
+      />
+
+      {error && (
+        <Alert intent="alert-basic">
+          <p className="text-sm">{error}</p>
+        </Alert>
+      )}
+    </SettingsCard>
+  );
+}