Can't select text language in Tools.Spelling&Grammar dialog
Version: 5.2.7.2 Build ID: 1:5.2.7-1+deb9u4 CPU Threads: 2; OS Version: Linux 4.9; UI Render: default; VCL: gtk3; Locale: en-US (en_US.UTF-8); Calc: group
Spell libraries hunspell-en-gb and hunspell-en-us are installed + all aspell libraries.
Spell check does not find errors.
When I open the Tools/Spelling/ dialog, Writer runs spell check, and finds no errors (even though I have put errors).
In the The Text Language selection button says [None]. Options under the button are English UK and English US, each with a checkmark beside.
However when I choose either option, the field returns to None.