As the end of the current mastery approaches, the message on the mastery page has changed to "This mastery expires in XX:XX:XX." (where X is a digit) from "XX days". If you play in Japanese UI, however, the message is broken and doesn't show the remaining time.

Steps to reproduce the bug

1. Run MTG Arena under the Jaspanese Locale (Adjust Options > Graphics > Locale > 日本語 (Japanese). You may need to exit and restart the game for the change to take effect.)
2. Visit the Mastery page.

Platform

PC (Windows 11 Pro 23H2 build 22631.4751)

Actual results

A flushing message below the page title starts with "セット・マスタリーの有効期限まで{daysCount}時間。".

Note that, comparing the text with its English version, I believe the "{daysCount}" is a placeholder for the remaining time.

Expected results

The message should read something like: "セット・マスタリーの有効期限までXX:XX:XX時間。" if we respect the current poor translation, or it could be improved like: "今回のマスタリーはあとXX:XX:XXで終了します。".

Relevant screenshots/videos

See the attachment.

Workaround

None known (except for not playing in Japanese).