Which languages the Windows app is available in, how System default picks one, and how to change the theme and the size of chat text. All of it applies at once.
Mac appAvailableApplies after a restart. No Simplified Chinese.
Windows appAvailableThe language and the theme apply at once, with no restart.
The Windows app can be shown in four languages, in a light or dark theme, with chat text as large as you like. You change all of it in Settings ▸ General, and each change applies at once. There is no restart and no Save button.
Theme, Chat zoom and Language are the first three rows of the General tab.
Language
Choose Language and pick one of:
Choice
What you get
System default
The language Windows is set to, if Haruno has it. Otherwise English.
English
English.
日本語
Japanese.
繁體中文
Traditional Chinese.
العربية
Arabic.
Each language is named in itself, so you can find your own even if the app is in a language you cannot read.
How System default decides:
Windows set to Japanese gives Japanese.
Windows set to Traditional Chinese (including Taiwan, Hong Kong and Macao) gives Traditional Chinese.
Windows set to Arabic, in any region, gives Arabic.
Anything else gives English. That includes Simplified Chinese, which is not offered. A Simplified Chinese Windows shows English.
Arabic reads right to left
In Arabic the whole app is mirrored: the menus, the navigation pane and the pages. The message box follows the direction of what you type, so text in another language keeps its own direction.
The language changes the app's own text, and the in-app guide changes with it, see The in-app guide. The word Playbook stays in English in every language, as the product's name. Other Playbook labels, such as Keep as My Playbook, are translated. On the welcome screen, a language choice in the top right corner does the same before you sign in.
Theme
Theme has three choices: Default, Light and Dark. Default follows Windows, so the app switches when Windows does. The other two stay as you chose.
Chat zoom
Chat zoom scales the text and content in the chat. The slider in Settings goes from 80% to 160%. In the chat itself you can also hold Ctrl and turn the mouse wheel, which goes from 60% to 250%. Ctrl+0 resets it. The setting is remembered.
What to tell a customer
The app is available in English, Japanese, Traditional Chinese and Arabic. Simplified Chinese is not offered.
If the app is in the wrong language, open Settings, then General, then Language. The picker shows each language in its own writing.