How can you provide feedback to a clirnt with a language barrier?

Clents are always right for their point of view. A client should know the international language as he communicates business with different countries' supplies and other sources, yet if any  client has language barrier to understand the service providers then to react the clients satisfaction , you can learn few essential words, sentences that help to overcome the situation or can take help google translate you can convince him or can take a mediator who also help to expedite the issue to strengthen the language barrier problems.