It probably shouldn't be pht()'d.

We used to do more pht('D%d: %s', $id, $title) stuff, particularly in Handle queries IIRC, which probably wasn't right either, but is at least sort of theoretically valid if : isn't a great separator character in some language.

Now that objects usually have a getMonogram(), this looks more like pht('%s: %s', $monogram, $title). Still probably a little silly, but maybe that's more conventional as - or ~ or something in Chinese. But I don't think there's any reason for the monogram construction itself to be translatable.

I figure we'll just clean this stuff up more generally in the future -- this code still really isn't "right", and it should probably load the rule and just call getMonogram() on it mooting the whole issue. At some point Herald needs a cleanup pass for transaction rendering and I imagine just cleaning up all this little stuff then.