I use Lyx in Hebrew, which means regular text is written in Hebrew, but equations are of course written in English. I used to have an installation, which (I believe by accident during installation process) every time I entered any equation environment, my language was auto-set to English. Then, returning to regular text it was again auto-set to Hebrew.
This was very convenient, as it saved me the trouble of changing languages all the time, and of course there is zero use of Hebrew in math except Aleph for cardinality.
I now wonder whether there is a more conventional way to achieve this without trying to make random mutations to Lyx installation processes. Thanks!