Show HN: Translation in the Age of GPT

DeepL and Google Translate impose hard limits on the size of the pptx files that they accept, even in their paying plans. This makes pptx translation effectively impossible for office-like usage.

I developed slidelang to remove this limit, but most importantly to take advantage of gpt-based translation and build a modern service : enabling the user to control the style of the translation.

For instance, translating to "Spanish" or "French" is too vague, when these 2 languages have tons of regional variations. Now users can instruct the translator to adapt to these variations, with additional stylistic instructions if they want ("formal", "business like", "for a young audience"... you freely type it).

Try this app and let me know what features would be useful to you?

NB: the app is entirely built with Java, back and front.