What does L1 mean?

L1 means: In linguistics L1 refers to a subject’s mother tongue or first language. (in Community Dictionary, added by Aubree Flores)

What else does L1 mean?

• SpaStudios uses L1 to refer to “Level 1”, which is a job or an occupation. See L2, L3. (in Community Dictionary, added by Jerónimo Gómez)