Applied corpus linguistics (ACL) as a methodological approach in language and social research has contributed important linguistics-based explications of discourse with critical language policy implications. ACL is understood to include the use of corpus resources, techniques, and tools in order to, for example, examine patterning in public discourses so as to obtain novel understandings of how language is used and construed in specific contexts (Thompson & Friginal, 2020). This paper presents results of two interrelated (case) studies exploring corpus distributions, in particular, of politeness markers, in aviation English communication and outsourced call center interactions. Both specialized corpora, Cross-Cultural Aeronautical Communication Corpus (CCACC) and Corpus of Outsourced Customer Service Calls (Co-CSC) are annotated across socio-cultural structures and task dimensions of interaction in these settings, focusing especially upon speakers’ role-relationships, discoursal goals and objectives, cultural identities, and power dynamics (Baker, 2021; Egbert, Biber, & Gray, 2022; Vine, 2020). Distributions of grammatical politeness markers (e.g., thanks, let's, and speech acts, polite requests, apologies, etc.) are interpreted by focusing on their macro and micro policy implications, especially highlighting emerging mismatches between linguistic realities (i.e., from corpora) and industry expectations.