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If you're a #firefox user, there's built-in translation available with 128esr. It's designed for translating web pages, so it's a bit awkward to use for arbitrary text, but you still can manually enter text.

Go to any web site that has text input (eg, https://paste.debian.net/).
Type in the text to translate, highlight it, right click and click "Translate selection to english". A pop-up will give you to/from language options, and then will display a translation once you select something.