build-set-language-environment-function): The functions deleted. (set-language-info): Doc-string modified. Chage handling of special keys describe-function and setup-function. (read-language-name): Return nil if a language specified does not have KEY. (current-input-method-title): Doc-string modified. (select-input-method): Set current-input-method to nil even if inactivation of the current input method failed. (set-language-environment): Doc-string modified. (describe-language-support): Doc-string modified. Calls an appropriate function for each langauge. (describe-language-support-internal): New function.
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