<li>In the event of substantial changes, we will provide the proposed changes to our users in at least three (3) languages (selected at our discretion) for open comment period lasting at least thirty (30) calendar days.

Wikipedia has a requirement to give to the community the ability comment on a proposal to change the terms. The proposal is translated in at least three languages if it is a susbtantial revision. Wikipedia has traditionnally been very inclusive in the way they deal with participation from the community.