Add Lingva engine #534
Description
This is a duplicate of #462 as the OP no longer needs this feature, but I do. I can make a PR if I will be able to understand the code base and the AWK syntax, but also if I get some free time for this.
https://github.com/thedaviddelta/lingva-translate
The main thing about this engine I want to point out is that you can use any URL for the hosted Lingva server. I think currently this project only uses hard-coded URLs, which means that some new configuration/flag should be added to make the use of this engine possible.