I got a lot of feedback that poeple need spell checking. In Inlage 4.2 you can use a spell checker: English and German dictionaries will be installed with Inlage; if you wirte in other languages you can find *.dic and *.aff files here. You only have to copy both into the Inlage/dicts directory and choose it in the dropdown.

I’m sorry that the spell checker makes Inlage slow if you have > 5000 lines…
An other new feature in 4.2 is active line highlighting. Set it to your background color (e.g. White) to disable.

Do have plan to overcome the slowness when > 5000 lines due to spell checker soon?
Sure, i did! Just try a million lines, it only checks what you see…
PS: If you really want to try a million lines and there are begin/end commands in it, disable folding before you test that