From Bhavishya Purana we can find Krshnamsa words addressed to Baliraja: These demons should never come to Aryadesha (India) with you, all of you should stay always in mleccha-desha and eat the followers of mleccha-dharma.
Baliraja became upset hearing these fearful, terrible words.
Then Krishnamsa said: as long as I‘m in this world you should simply stay in your home, after that you come here and do whatever you like‖.
From another website it is found: https://www.wisdomlib.org/definition/mlecchadesha
"Mlecchadeśa (म्लेच्छदेश).—a country inhabited by non-Āryans or barbarians, a foreign or barbarous country; कृष्णसारस्तु चरति मृगो यत्र स्वभावतः । स ज्ञेयो यज्ञियो देशो म्लेच्छदेशस्त्वतः परः (kṛṣṇasārastu carati mṛgo yatra svabhāvataḥ | sa jñeyo yajñiyo deśo mlecchadeśastvataḥ paraḥ) || Ms.2.23.
Derivable forms: mlecchadeśaḥ (म्लेच्छदेशः).
Mlecchadeśa is a Sanskrit compound consisting of the terms mleccha and deśa (देश). See also (synonyms): mlecchamaṇḍala. Source: Cologne Digital Sanskrit Dictionaries: Shabda-Sagara Sanskrit-English Dictionary
(-śaḥ) The countries bordering on India, or those inhabited by people of a different faith and language; defined to be any, where the black antelope is not found. E. mlecch a barbarian, an outcast, deśa country."
क्या म्लेच्छ लोग गैर भारतीय पैदा हुए हैं या केवल अब्राहम विश्वासी हैं?
WHAT ABOUT CHRISTIAN AND MUSLIM INDIANS? ARE THEY MLECCHA-DESHA?
In short, does the term mleccha-desha, and mleccha-dharma refer to foreign ideologies like Christianity or Islam, or is based on race/geographical location? For example, would Indian Muslims and Christians be considered mlecchas in the context of this citation? They satisfy the desha condition (ie. they reside in India), but do not satisfy the dharma condition (they do not follow the dharmic approach to life.)