Rashi (Sanhedrin 44b) A person should always pray that all the heavenly beings strengthen his power of prayer – in other words that the angels should assist him in prayer and that he have no enemies in Heaven
Rashshash (Sanhedrin 44b) The gemora states a person should always pray for mercy that all heavenly beings should strengthen his power of prayer. From this we can bring support for the prayers addressed to angels which many criticize. However perhaps this is permitted for the individual as is stated in Sotah (33a)
Shulchan Aruch (O.C.101) One may pray in any language one desires; and this applies when one is praying together with a congregation. But when one is praying alone, one should only pray in the Holy Language. And some say that this requirement to only pray in Hebrew only applies when one is asking for one's own personal needs, for example: one who has prayed for someone who is ill, or for some affliction in one's household; however, when reciting the regular liturgy established for the congregation, even an individual may recite it in any language. And some say that even an individual requesting his own personal needs may request them in any language one wishes, except for in the Aramaic language.
Sotah (33a) A man should never pray for his needs in Aramaic. For R. Johanan declared: If anyone prays for his needs in Aramaic, the Ministering Angels do not pay attention to him, because they do not understand that language! There is no contradiction, one referring to the prayer of an individual and the other to that of a Congregation.
Yerushalmi (Brachos chapter 9:1) If a human is in trouble, he should cry neither to Michael nor to Gabriel, rather he should cry to Me and I shall answer him immediately