I am a Spaniard which I learnt to use the ES layout as the 100% of the Spaniards and then I realized it sucked a lot for programming symbols. If you use Linux/BSD for programmaing and don't run something
like "setxkbmap us -option ctrl:swapcaps -option compose:rwin" (or menu instead or rwin in order to use menu+'+a to type á, you are losing your time. Stuff like "recogerá" can be easily written with menu+' made solely with the right hand as a pinch and 'a' with the left key. The only issue is 'ñ' which is a bit cumbersome to type, but there aren't many words with 'ñ' usable in the same context.
The other approach I've seen is having some sort of weird key combination (like "hitting both shift keys at once") to switch back and forth between two layouts. I saw somebody using it for QWERTY vs. DVORAK but it seems like it'd be viable for two language layouts too.
