noun
broken English; halting English
Refers to English spoken with poor grammar, limited vocabulary, or hesitant delivery, often by a non-native speaker.
彼は片言英語で道を尋ねた。
He asked for directions in broken English.
片言英語でも通じれば十分だ。
Even broken English is enough if you can make yourself understood.
片言 means 'baby talk' or 'broken speech' in general; 片言英語 specifically refers to broken English.
Compound of 片言 (かたこと, 'broken speech') and 英語 (えいご, 'English').