Merge pull request #3015 from github/henrymercer/language-autodetecti… #4643

Job	Run time
Diagnostic export (windows-latest, nightly-latest)	3m 31s
Diagnostic export (macos-latest, linked)	1m 53s
Diagnostic export (ubuntu-latest, nightly-latest)	1m 23s
Diagnostic export (windows-latest, linked)	3m 17s
Diagnostic export (ubuntu-latest, linked)	1m 20s
Diagnostic export (macos-latest, nightly-latest)	1m 24s
	12m 48s

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