Hello @jonthewong
Upon checking further with the development team, the reason we have not added en_CA in the list is that it is not supported by Facebook yet.
https://developers.facebook.com/docs/messenger-platform/messenger-profile/supported-locales/
As of July 2018, the following are valid og:locale choices :
en_us, ca_es, cs_cz, cx_ph, cy_gb, da_dk, de_de, eu_es, en_pi, en_ud, ck_us, es_la, es_es, es_mx, gn_py, fi_fi, fr_fr, gl_es, ht_ht, hu_hu, it_it, ja_jp, ko_kr, nb_no, nn_no, nl_nl, fy_nl, pl_pl, pt_br, pt_pt, ro_ro, ru_ru, sk_sk, sl_si, sv_se, th_th, tr_tr, ku_tr, zh_cn, zh_hk, zh_tw, fb_lt, af_za, sq_al, hy_am, az_az, be_by, bn_in, bs_ba, bg_bg, hr_hr, nl_be, en_gb, eo_eo, et_ee, fo_fo, fr_ca, ka_ge, el_gr, gu_in, hi_in, is_is, id_id, ga_ie, jv_id, kn_in, kk_kz, ky_kg, la_va, lv_lv, li_nl, lt_lt, mi_nz, mk_mk, mg_mg, ms_my, mt_mt, mr_in, mn_mn, ne_np, pa_in, rm_ch, sa_in, sr_rs, so_so, sw_ke, tl_ph, ta_in, tt_ru, te_in, ml_in, uk_ua, uz_uz, vi_vn, xh_za, zu_za, km_kh, tg_tj, ar_ar, he_il, ur_pk, fa_ir, sy_sy, yi_de, qc_gt, qu_pe, ay_bo, se_no, ps_af, tl_st, gx_gr, my_mm, qz_mm, or_in, si_lk, rw_rw, ak_gh, nd_zw, sn_zw, cb_iq, ha_ng, yo_ng, ja_ks, lg_ug, br_fr, zz_tr, tz_ma, co_fr, ig_ng, as_in, am_et, lo_la, ny_mw, wo_sn, ff_ng, sc_it, ln_cd, tk_tm, sz_pl, bp_in, ns_za, tn_bw, st_za, ts_za, ss_sz, ks_in, ve_za, nr_za, ik_us, su_id, om_et, em_zm, qr_gr and iu_ca
Hope that helps. Please let us know if there’s anything else we can help you with.
Thank you.
