The ​​​​​​​​​«data-bind i18n» expressions with JavaScript function calls are used in the core, but untranslatable due to the regular expression and architectural limitations

Localization
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For example:
https://github.com/magento/magento2/blob/444e252d40b3a5d5cca3468a9819743af8ed3513/app/code/Magento/Ui/view/base/web/templates/grid/controls/bookmarks/bookmarks.html#L18

The text Default View can not be translated because the regular expression limitations:
https://github.com/magento/magento2/blob/444e252d40b3a5d5cca3468a9819743af8ed3513/app/code/Magento/Translation/etc/di.xml#L60

The string i18n: activeView() ? activeView().label() : 'Default View' does not match the regular expression ~i18n\:\s*(["'])(.*?)(?<!\\)\1~ so we can not translate Default View.

https://github.com/magento/magento2/issues/1905

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See also: