The mandatory binding-arbitration clause with class-action waiver under Korean law (rewritten ToS Article 20) materially restricts dispute resolution options and creates jurisdiction uncertainty for US-based users. Free-tier users' content is used to improve Wordvice AI algorithms by default, with no explicit opt-out mechanism documented in public policy.
Paid/premium users should confirm via support whether training-use restrictions apply (not stated in public policy but may exist in contract terms); disable free-tier usage for any proprietary or confidential content. For US users, document the arbitration terms in vendor-management records and review the rewritten ToS Article 20 with legal counsel before signing.