liǎng / wèi / lǎo / rén / bú / huì / shuō / tóng / yì / zhǒng / yǔ / yán / zhǐ / hǎo / tōng / guò / bǐ / tán / jiāo / liú

两位老人不会说同一种语言，只好通过笔谈交流。

The two elderly people did not speak the same language, so they communicated by writing notes.