(By Hedvig Skirgård): "Are there verbs that use a different stem depending on the number (singular, dual, plural, etc.) of a core participant? The participant triggering the suppletive choice could be A, P, or S. Auxiliary verbs are also considered verbs for the purpose of this feature. ❡
Suppletion is a process where a lexeme is changed in such a way that the new form does not resemble the previous when it appears in a different position in the paradigm. An example of this is English went and go. In this case, the verb is suppletive for tense. Only strong suppletion (different stems) counts. There should be at least three verbs with participant number suppletion to count as 1. If only one or two verbs are described as exhibiting suppletion, code 0. If the author gives two examples but states or implies that it is more common, code 1. ❡
Only so called 'strong suppletion' counts here, 'weak' suppletion is not included."