A thumbnail label may need to work for viewers who read different languages. More translations are not always more helpful if the result becomes too crowded to read.
Choose the primary audience
Identify the language of the video and the audience the image serves. Use wording that matches the actual viewing experience. A multilingual label should not imply that a spoken-language version exists when it does not.
Review the script properly
Check spelling, text direction, line breaks, and font support with a competent reader. Different writing systems can require different spacing and visual proportions. Avoid treating a machine-translated phrase as a finished design without review.
Reduce unnecessary words
A clear object or action may communicate across languages better than several stacked labels. If you create localized variants, keep their source files and language codes distinct. Review each at small size rather than assuming a layout that works in one language will accommodate a longer translation unchanged.