What does “格” mean in "爾國臨格"?
the verse is chopped wrongly lah, i would read it as &quot;爾&quot; + &quot;國&quot; + &quot;臨格&quot;.
&quot;臨格&quot; ought to be read together as a verb, with the meaning of &quot;come / arrive&quot;.
the entry of &quot;格&quot; in 國語辭典 explained (the sixth, as verb):

至、來。《書經．堯典》：「光被四表，格於上下。」宋．蘇軾〈賀時宰啟〉：「歡聲格於九天，乖氣消於萬彙。」

http://dict.revised.moe.edu.tw/cgi-bin/cbdic/gsweb.cgi?o=dcbdic&amp;searchid=W00000003946
for comparison, consider the word &quot;蒞臨&quot;, which means ~ &quot;come / arrive / be present&quot;; while the character &quot;蒞&quot; means &quot;to reach / arrive&quot;, and &quot;臨&quot; means &quot;come to / arrive / be present&quot;.
the main prayer text is translated by mr 王韜, imo, excellent one.
http://www.rhenish.org/Common/Reader/News/ShowNews.jsp?Nid=3782&amp;Pid=5&amp;Version=80&amp;Cid=151&amp;Charset=big5_hkscs
usages of &quot;臨格&quot; in literatures of yore:
in 文忠集　卷八十六

皇帝親詣啓聖禪院告遷明徳元徳章穆皇后赴普安院奉安祝文
嚮者因霖災之為沴・飭殿構以増新・㳙榖旦之惟良・奉神遊而還止・載深感慕・躬薦芬馨・式慰孝思・冀茲臨格


in 廬山太平興動宮採訪真君事實, the 滿散詞:

惟廬嶽之名峰，實天仙之奧宅。夢符晝現，雖自開元之傳；邇遠名彰，邈想真王之始。應世則帝王之佐，在天惟耳目之司。千齡昔紀於元豐，四字首加於徽號。備玆褥禮，屬在休期。鏤玉填金，煥成章於雲漢；臨軒發冊，增偉觀於江山。顧熙事之嘉成，涓良辰而祝告。伏願威神臨格，昭鑒居飲。薰燎揭虔，共仰九霄之邃；厲鴻嘖祉，永言萬壽之期。併敷錫於庶民，俾交欣於百樂。

http://www.ctcwri.idv.tw/CTCW-CMTS/CMT07正乙部/CMT07ALL/CH07094盧山太平興國宮採訪真君事實/CH07094-2卷二宋朝崇奉類.htm
have fun :)