Ganesh Mantra

Om Gam Ganapataye Namo Namah Shree Siddhi Vinayak Namo Namah Ashtavinayak Namo Namah Ganapati Bappa Moraya

Om = Salutations! Everyone wake up!
Gam = The secret power sound of Ganesh. It is his "seed syllable" or bija mantra.
Ganapataye = Another name of Ganesh, the breaker of obstacles.
Namo = Salutation, worship , a common spoken valediction or salutation
Nama/Namah = bow, obedience, reverence, salutation, adoration or name

Namaha = this is not mine
Ashtavinayak = literally means "eight Ganeshas" in Sanskrit.
Shri/Sree/Sri/Shree = is a word of Sanskrit origin, used in the Indian subcontinent as a polite form of address equivalent to the English "Mr." or "Ms." in written and spoken language, but also as a title of veneration for deities.
Siddhi = spiritual, paranormal, supernatural, or otherwise magical powers, abilities, and attainments that are the products of spiritual advancement through sādhanās such as meditation and yoga
Vinayak = Sanskrit name for boys, meaning "Lord of Obstacles"
Bappa = father, papa
Moraya = name derived from two words, Mhora ya, which means come ahead and bless us. Maraya refers to a famous devotee of Lord Ganesh in the fourteenth century called Morya Gosavi, his devotion was looked upon as madness. Moraya invoked the lord with severe penance and attained siddhi (special powers and blessings). Moraya and his son built a temple to commemorate the event. Lord Ganesha was so pleased he blessed Morya and said he would fullfill any of his wishes. Morya asked to be remembered forever on this earth whenever anyone remembers his Lord, as his 'Param Bhakt'. Thus this depicts the inseparable relationship between God and his devotee.
Ganapati Bappa Moraya is used as phrase.

The best translation I can come up with is:
"Salutations to Ganesh. Honorific salutions of worship for the supernatural Lord of Obstacles. Salutation and adoration to the eight forms of Ganesh. Praise and salutiation to our Father and Lord Ganesh."