In such cases, the forgotten DFMs do not contain the translations.
Then, when the programmer does recreate the SIB from the DFM, all previously recorded translations are deleted

This problem is may be related with the fact that when we open a project, TsiLang Expert does not "see" the real number of languages in Forms that are not yet opened by Delphi 7 Browser. TsiLang displays "1" instead of "3" (the correct number of languages) for closed projet units.