To split interface texts into separate sentences, which are imported from XML file as they are stored like that in the configuration, you need to use the Dictionary merging data processor. You can open it by clicking the button with the Translate by dictionary, dictionary merging tooltip or in Translation section click Tools and then Dictionary merging.
In both Dictionary to be translated and By dictionary fields there should be the dictionary where you imported interface texts.
The only check box that should be selected is Split 1C configuration interfaces into sentences.
Now click Refresh. And you will see the list of found dictionary entries, having more than one sentence in original text. They will be split into sentences, and if in translation there is the same number of sentences, check boxes on the left will be selected. In that case we guess that sentences in original text match one by one the sentences in the translation. If the number of sentences do not match, you attention is more likely required and check boxes are not selected.
You need to review the result, select rows that you prefer to add to the dictionary. You can also edit suggested translations by clicking Edit translation suggestion button on the command bar of the table.
When finished, click the Write selected translations button and you will have the result saved in the dictionary that you selected in the Dictionary to be translated field.