We cannot enter the kingdom of heaven without a cleansing process. When we call on the name of the Lord, God answers with heaven's blowtorch. Jewelers use a blowtorch to refine gold or silver. As the blowtorch melts the gold or silver, slowly all the black impurities in the molten lump come to the surface where they can be removed. For then will I turn to the people a pure language, that they may all call upon the name of the LORD, to serve him with one consent.
Every human language has profanity.
Every one has been used to tell a lie. Every one has words to describe the evil deeds of sinful humanity. Our corrupt languages are insufficient to call on the name of the Lord. When a person repents of his sins and is baptized in Jesus' name for the remission of those sins, God sends the fire of the Holy Spirit for purification. With it comes a new language.