Only ja seems to be erroneous for the Q3 dates. At Translations:Wikimedia Audiences/38/ja, it reads "Q3: October - December 2017", but Q3 should be January – March 2018 for ? Kindly confirm
Topic on Translations talk:Wikimedia Product/38/en
Yes, that's correct. Q3 (the third quarter of the Wikimedia Foundation's fiscal year) is January–March 2018. Thank you taking the time to investigate, and please do edit the Japanese translation to correct it :)
Japanese has been updated, thank you for your time to reply me, Cheers.