Meaning trap
pick up
learn casually
To learn something without formal lessons, often by hearing or watching others.

Don't mix these meanings
Same phrase, different job.
To learn something without formal lessons, often by hearing or watching others.
Another meaning of 'pick up' is 'collect'; compare the examples to keep the meanings separate.
Hear it in context
Notice where the phrase sounds natural.
She picked up some Spanish while traveling in Mexico.
I picked up a few useful phrases by listening to English songs and watching movies.
Fix the pattern
One small grammar move makes it sound right.
Not: I picked up English at university for four years.
Say: I studied English at university for four years.
Formal, sustained study is 'study/learn'. 'Pick up' is casual and incidental.
Which sounds natural?
Tap the one a native speaker would say.
For informal, by-exposure learning, natives say 'pick up'. 'Acquire' sounds academic; 'study' implies a classroom, the opposite of this sense.
Build natural chunks
Words that usually travel with it.
pick up + skill
- a bit of Spanish
- the basics
- a few phrases
- some cooking
Don't confuse it
Related
Other meanings and phrases to compare.
- pick up (collect) — Another meaning of 'pick up' is 'collect'; compare the examples to keep the meanings separate.