Thanks for your report! Hmm... That wiki page you referred to was last edited 11 years ago and is obsolete to a large extent.
Today, on an Ubuntu system, it's normally GTK (not IBus, so I'm closing this bug report) which deals with rules in the ~/.XCompose file. I can confirm that GTK does not seem to be able to handle multi character strings. But if I switch to XIM it works for me. * Open Language Support and change the "Keyboard input method system" to "XIM" * Reboot Please note, though, that replacing "IBus" with "XIM" may result in other subtle issues. ** Changed in: ibus (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ibus in Ubuntu. https://bugs.launchpad.net/bugs/1845332 Title: Compose key does not create strings Status in ibus package in Ubuntu: Invalid Bug description: According to manual https://wiki.ubuntu.com/ComposeKey it is possible to define sequences to type characters and strings with Compose key. In Ubuntu 18.04 sequences work for characters but not for strings, line like this: <Multi_key> <b> <t> <w> : "by the way" # Compose b t w seems to be ignored. $ apt-cache policy ibus ibus: Installed: 1.5.17-3ubuntu5.2 Candidate: 1.5.17-3ubuntu5.2 Version table: *** 1.5.17-3ubuntu5.2 500 500 http://mirror.isoc.org.il/pub/ubuntu bionic-updates/main amd64 Packages 500 http://mirror.isoc.org.il/pub/ubuntu bionic-security/main amd64 Packages 100 /var/lib/dpkg/status 1.5.17-3ubuntu4 500 500 http://mirror.isoc.org.il/pub/ubuntu bionic/main amd64 Packages 500 http://cz.archive.ubuntu.com/ubuntu bionic/main amd64 Packages This problem first reported at Dec 11 '18 and also exists in Kubuntu 18.04 (see https://askubuntu.com/questions/1099947/how-to-use- xcompose-to-produce-snippets). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ibus/+bug/1845332/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp