The custom string function in v4 should be expanded in v5

[ZhangChengLin]

Translating or customizing the strings with HTML

.custom-file-input~.custom-file-label[data-browse]::after { content: attr(data-browse); }

I personally feel that this is a good solution. In v5, for example, the arrow svg of the accordion can be added to support similar custom settings.
As a result, similar places can easily become dynamically controllable.