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✔️ ja is a well-formed language code.
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MediaWiki core messages: 99.67 %: 3973 / 3986 messages
Most important messages: 100.0 %: 578 / 578 messages
Collection extension: 100.0 %: 176 / 176 messages
ProofreadPage extension: 86.49 %: 160 / 185 messages
Android Wikipedia app: 92.51 %: 1989 / 2150 messages
iOS Wikipedia app: 64.31 %: 1155 / 1796 messages
Main extensions used by Wikimedia: 85.41 %: 6152 / 7203 messages
Most important messages: 100.0 %: 578 / 578 messages
Collection extension: 100.0 %: 176 / 176 messages
ProofreadPage extension: 86.49 %: 160 / 185 messages
Android Wikipedia app: 92.51 %: 1989 / 2150 messages
iOS Wikipedia app: 64.31 %: 1155 / 1796 messages
Main extensions used by Wikimedia: 85.41 %: 6152 / 7203 messages
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