This paper argues that under John XXII (1316-1334) "schism" functioned less as a neutral label for the Christian East than as a governance category used to police ritual boundaries and stabilize Latin communal identity in mixed environments. Instead of surveying Greek-Latin relations, it offers a focused comparison of two micro-cases drawn from papal documentation. First, a letter concerning the Principality of Achaia (1322) complains that Latins "converse with Greek schismatics," attend their churches, make offerings to schismatic priests, and receive sacraments according to their rite, while also allowing Greeks to participate in Latin offices. Read against the everyday reality of shared sacred spaces, the letter frames inter-ritual sociability as a threat to both souls and jurisdiction, revealing how "schism" becomes a language of social discipline and boundary-making. Second, the "Mangana affair" on Cyprus—centered on Abbot Germanos of St George of Mangana and John XXII's letter of 8 July 1322—shows the papacy functioning not only against an external "schismatic other" but within intertwined Greek-Latin networks. Here local actors appeal to Rome for protection and arbitration, and papal authority is performed through pastoral-juridical intervention in an Eastern ecclesiastical dispute. A brief comparative glance at John XXII's diplomacy beyond the Latin-Greek field (notably his inclusive references to "Christians" in communications with non-Christian rulers) highlights the strategic elasticity of confessional labels: schism-talk could harden to curb ritual mixing, yet soften when political efficacy required broader Christian representation. Taken together, these cases clarify how schism discourse, politics, and identity formation intersected in Avignon governance. Methodologically, the paper combines close reading of curial rhetoric with attention to local social practice and institutional constraints.