Well, as I said, I just learned how LIKE behaves with Czech_CI_AS collation, so no, I haven't used it yet. However, I use Czech_BIN when I need to order Czech strings (with Czech collation) in order of English alphabet:

CREATE TABLE #t ([string] VARCHAR (5));

INSERT INTO #t ([string])

VALUES ('ACH');

INSERT INTO #t ([string])

VALUES ('ACY');

INSERT INTO #t ([string])

VALUES ('AHHC');

-- Output: 1. ACY, 2. AHHC, 3. ACH

SELECT

Row_Number() OVER (ORDER BY [string]), [string]

FROM

#t;

-- Output: 1. ACH, 2. ACY, 3. AHHC

SELECT

Row_Number() OVER (ORDER BY [string] COLLATE Czech_BIN), [string]

FROM

#t;

DROP TABLE #t;

A note for people not familiar with Czech language: in the Czech alphabet, a letter "CH" is just between letters "H" and "I".