Optimizing your video content for different languages can be done by optimizing your metadata. This information describes your video content and helps search engines and platforms rank and display it. To do this, you can use keywords that match the language and intent of your viewers. Tools such as Google Keyword Planner, YouTube Keyword Tool, or SEMrush can help you find and analyze keywords. Additionally, tools like Google Trends, YouTube Trends, or BuzzSumo will show you the popular and relevant topics and terms in your niche and industry. Titles and descriptions should be clear, catchy, and informative for viewers, which can be done with the help of CoSchedule Headline Analyzer, Yoast SEO, or Hemingway Editor. Grammarly, ProWritingAid, or LanguageTool will check and correct grammar and spelling errors for your video content. Lastly, tags and categories should be specific, relevant, and consistent for your video content; TubeBuddy, VidIQ, or Morningfame can help you with that. You can also use Google Search Console, YouTube Analytics, or Facebook Insights to see how your tags and categories perform and optimize them accordingly.