Possible Clues:

• Make comprehensible commuter's lament? Not I
• Decipher stone tablet after time passed
• Move to another place a problem for rail passengers? Not I
• Farsi can become français, if you do this
• Explain
• Express (words) in another language
• A slattern corrupted convert
• Make accessible
• In other words, the trains without one are behind time
• Time slowed down taking second to change