It is The Udanavarga .
Besides it receives the title "Tibetan Dhammapada" actually this text is an translation to English by Gareth Sparham of The "Udanavarga" (Tibetan:Ched du brjod pa'i tsohoms). which is a Sanskrit Buddhist text similar to the Dhammapada, containing many of the same verses. The Tibetan Buddhist canon contains two recensions of it, which are traditionally said to have been compiled by Dharmatrata. The Udanavarga has around nine hundred and fifty verses in thirty-three chapters, whereas the most common version of the Dhammapada. When the Pali, has only four hundred and twenty-three verses.
--- I just regret for not having the Tibetan text with it! --- Thats why I´ve put 4 stars only!!!