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If you feel like selfhosting, OmniPoly is a great option.
Key Features:
Translation: Text translation across multiple languages (see: libretranslate).
Grammar Checking: Ensures your text is not only translated but also reads well with proper grammar and style (see: languagetool).
AI-Powered Insights: Utilizes Large Language Models to analyze sentiments and extract interesting sentences, adding depth to your translations (see: ollama).
i just use google and deepl, maybe some yandex if i'm doing russian->english. would like a better alternative but i'm not aware of any.
Firefox and derivatives (e.g. Librewolf) have private built-in, on-device translation.
Wish they kept the toolbar addon :/ I know you can access it using about:translator, but it's not as accessible.
To be honest, Yandex's proprietary services are irreplacable and significantly better than Google. Many more languages too.
https://codeberg.org/ManeraKai/simplytranslate
https://codeberg.org/aryak/mozhi
Really? Yandex? Whoda thunk.
Would probably prefer to use open source one though, which of the ones you mentioned do you like best?
Linguist extension (Chromium/ Firefox)
or Crow Translate on Desktop
In my experience the kagi translator was the best
It is quite good. It has good readout voices and offers idiomatic alternative translations. Also has good bookmarklets.
Apertus PublicAI is also capable to translate in a lot of lenguages, among other uses. Swiss made, privacy focused and FOSS. On eye level to the most advanced US AIs. It use the infrastructure of the Swiss National Supercomputing Centre (CSCS)
This immediately asks for an account. Not great honestly…
Account is free, minimum data (nick and mail, if you want, use an disposable one), well, also Lemmy need an account like almost any other service you use. The account is not shared, but with account you can customize it with plug ins and for an API. Otherwise you can selfhost it, but than you don't have the power of the supercomputer from the swiss datacenter, the same used by the LHC of the CERN, but only the server you use to host it. It don't store previous chats if you don't want, otherwise only stored in your HD.
Webbkoll test
For phone? Android? Do you need to translate photos (restaurant menus, signs on the street, etc...)?
Stay with DeepL
I'd stay away from Yandex. Former user here is excellent but: https://arstechnica.com/security/2025/06/meta-and-yandex-are-de-anonymizing-android-users-web-browsing-identifiers/
I use the FluentRead browser extension with a locally-hosted LLM.
There should be more on https://alternativeto.net/ when you search "DeepL" for alternatives
Since many are listed here but I am sure there are more