Update README.md

README.md

@@ -14,7 +14,7 @@ The code for training mCOLT/mRASP2, a multilingual neural machine translation tr
 ## News
 We have released two versions, this version is the original one. In this implementation:
 - You should first merge all data, by pre-pending language token before each sentence to indicate the language.
-- AA/RAS muse be done off-line (before binarize), check [this toolkit](https://github.com/linzehui/mRASP/blob/master/preprocess).
+- AA/RAS must be done off-line (before binarize), check [this toolkit](https://github.com/linzehui/mRASP/blob/master/preprocess).
 
 **New implementation**: https://github.com/PANXiao1994/mRASP2/tree/new_impl