[sebastiansm]

Anyone can recommend a small model specific for translation? english to spanish mostly.

[pzo]

Depends what you mean small 4B? 7B? You can try qwen2.5 3B or 7B though 3B version is on no commercial license. Phi4-mini also should be good. Tested only on polish/english pairs should be good for spanish too. Smaller models like 1.5B were kind of useless for me.

[archerx]

I haven't done deep testing on it but Tower-Babel_Babel-9B should be what you are looking for.