Imm is disabled by default on North American Windows installations. That's a behavior I think should be mimicked in wine.
http://msdn2.microsoft.com/en-us/library/ms776161.aspx
IMM is only enabled on East Asian (Chinese, Japanese, Korean) localized
Windows operating systems. On these systems, the application calls GetSystemMetrics with SM_DBCSENABLED to
determine if IMM is enabled.
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