-- preprocessing xmt -- For language 'english' several language ids were found: en_US - 0409; en_GB - 0809; en_AU - 0C09; en_CA - 1009; en_NZ - 1409; en_IE - 1809; en_ZA - 1C09; en_JM - 2009; en_ - 2409; en_BZ - 2809; en_TT - 2C09; Instead of using first in the list, suggest to define your LANG environment variable like this: LANG=en_US Assembly successful. -- allocating registers for xmt -- -- creating xmt.uca -- sed: file xmt.sed line 5: Invalid reference \2 on `s' command's RHS -- assembling xmt -- For language 'english' several language ids were found: en_US - 0409; en_GB - 0809; en_AU - 0C09; en_CA - 1009; en_NZ - 1409; en_IE - 1809; en_ZA - 1C09; en_JM - 2009; en_ - 2409; en_BZ - 2809; en_TT - 2C09; Instead of using first in the list, suggest to define your LANG environment variable like this: LANG=en_US Preprocessing successful; output file, "xmt.uci" written. Reading "xmt.uci": pass 1... Reading "xmt.uci": pass 2... Number of uwords compiled: 0 Number of pages compiled: 1 Ucode output written to: "xmt.list" Assembly successful. -- extracting xmt -- perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_CTYPE = "", LANG = "english" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). rm xmt.sed