Just found this service. No idea how accurate it is.
3 Likes
I wanted to check how accurate Polish translation would be, but it doesn’t support that language.
Same here with Danish… 
I’m sure it’s a work in progress.
Another good one…
Apertium
Online Translate: https://www.apertium.org
Wiki: Apertium
GitHub: GitHub - apertium/apertium-all: All Apertium language pairs, modules, tools and core
“Apertium is a free/open-source machine translation platform, initially aimed at related-language pairs but expanded to deal with more divergent language pairs (such as English-Catalan).”
"Apertium is a rule-based machine translation toolchain and ecosystem, with many of our tools based on finite-state transducers.
Our language agnostic tools are native and written in C++. The various development helpers are mostly in Python.
Our language data is in various formats, including XML and other human-editable texts. Language data is split into single-language packages that can analyse and generate a given language, and translation pairs that perform transfer and transformation between two languages. The single-language packages are shared amongst many pairs."
2 Likes
There’s also an app version of LibreTranslate someone created as a side project:
Argos Translate
Main site: https://www.argosopentech.com/
About: Argos Open Tech
GitHub/install instructions: GitHub - argosopentech/argos-translate: Open-source offline translation library written in Python
Catalan, nice.