Add language field for papers?

Though the papers in the Anthology are predominantly in English, there are a number of papers in languages such as French, Chinese, and [Nordic languages](https://www.aclweb.org/anthology/volumes/W85-01/). Sometimes the title is suffixed with the name of the language in brackets, but [not always](https://www.aclweb.org/anthology/volumes/C73-2/).

Wouldn't it be good to have a metadata field specifying the language? Citation managers such as Zotero already support a language field. Because the range of languages that the papers are written in is limited, heuristic language ID should be easy.