Changes
m
tag with {{heavily used template}}, currently about 5 million transclusions, #1 on the most used templates list
<noinclude>{{heavily used template}}</noinclude>{{#switch:{{{1}}}|ar|arc|arz|bcc|bqi|dv|fa|fa-af|glk|ha|he|kk-arab|kk-cn|ks|ku|ku-arab|mzn|prd|ps|sd|ur|ydd|yi=rtl|ltr}}<noinclude>
Outputs "<tt>rtl</tt>" for right-to-left languages else "<tt>ltr</tt>".
'''{{int:usage}}:''' <nowiki>{{</nowiki>Tlf|dir|''language_code''}}
Currently it recognizes the following rtl languages: