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Every combination the program listens to, and what it does.
ctrl + win
Hold by default; a toggle mode is available in Controls & behaviour.
Esc
While the plate is up. Nothing is inserted.
your own
Each post-processing prompt can carry its own combination.
your own
Set in the Translation block.
ctrl + K
Inside the settings window; searches the manual too.
1…9, Enter
When it asks which language to translate into.
Any combination can be reassigned. The field warns when Windows has already claimed the one you picked.