How many layouts do you currently use?

[W. R.]

I should look for some software which would make switching them more convenient.

I have them five: [EN] English (the US), Belarusian, [DE] German, [RU] Russian, [UK] Ukrainian (not "[B]United Kingdom"!).

[Lars]

One.

[DA] Danish.

[The Lawspeaker]

Four.

[EN] U.S.A, [DU] Swiss German, [NO] Norwegian and [NL] Dutch.