Christian Ok, the “dummy screen” method is usable (although not at all elegant) and you could probably add it to the mentioned documentation page.
However, we encountered one more issue with translations: Is there are a suggested way of defining translatable strings with placeholder or format arguments, i.e. the printf() equivalent in Javascript? Example: popup(“Should the file %s be deleted”, filename)? String concatenation would work for one single language, but is not at all translatable, where instead strings with placeholder arguments are needed.
Google brings up suggestions like these https://stackoverflow.com/a/4673436 which is a small added String.format() function. But this requirement is needed so often that we would expect a common solution either in OpenUI5 or in Simplifier. Any ideas?