This issue is specific to ubuntu ( gtk css customization ), and it seems to have been fixed in subsequent releases. Check attachment for plugin in 18.04 preview release, where this issue is not seen.
** Attachment added: "peas_chinese_ubuntu.png" https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/1567995/+attachment/5020999/+files/peas_chinese_ubuntu.png -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to rhythmbox in Ubuntu. https://bugs.launchpad.net/bugs/1567995 Title: Plugin interface text display is not complete( 插件界面文字显示不完整 ) Status in rhythmbox package in Ubuntu: Confirmed Bug description: In the plug-in window can only see the name of the plug-in, which shows the information of the text only half 在插件窗口只能看到插件的名字,其说明信息的文字只显示一半 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: rhythmbox 3.3-1ubuntu6 ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6 Uname: Linux 4.4.0-17-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu1 Architecture: amd64 CurrentDesktop: Unity Date: Sat Apr 9 07:00:20 2016 InstallationDate: Installed on 2016-04-08 (0 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160407) SourcePackage: rhythmbox UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/1567995/+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