Broken English, Broken Language
Noun and の adjective
かたこと
私は片言の日本語でなんとかパスポートの再発行をしてもらいました。
I managed to get my passport reissued with my broken Japanese.
One sided saying things means you don't know both sides of the language, making you have broken Japanese or broken language.
The reading is the reading you learned for 片 and the こと of 言葉.