Hello, take the following PlainTeX file: %&luatex \lccode`\(=0 % Just to be on the safe side \showhyphens{regarding} \showhyphens{(regarding} \showhyphens{regarding)} \bye This results in: This is LuaTeX, Version snapshot-0.25.3-2008060319 (Web2C 7.5.6) (hyphenOther.tex Underfull \hbox (badness 10000) in paragraph at lines 5--5 [][] \tenrm re-gard-ing Underfull \hbox (badness 10000) in paragraph at lines 6--6 [][] \tenrm (regarding Underfull \hbox (badness 10000) in paragraph at lines 7--7 [][] \tenrm re-gard-ing) ) (see the transcript file for additional information) No pages of output. Transcript written on hyphenOther.log. Time elapsed: 1 seconds. It seems that the "(" -- but not the ")" -- is treated as part of the word, even though its \lccode is zero. What am I doing wrong? Thanks in advance, Jonathan