bigquery code not translating Guillemets « and » correctly - google-bigquery

Question

The following bigquery code does not display correctly Guillemets « and ». In the output of the code below, notice that the Guillements are 'translated' as xAB and xBB. The expected answer should preserve the current translation but replace xAB with « and xBB with ».
CREATE TEMP FUNCTION
decode(word string) AS ((
SELECT
IF
(STARTS_WITH(word, '&#x'),
safe.code_points_to_STRING(ARRAY(
SELECT
ifnull(SAFE_CAST(value AS int64),
ASCII(value))
FROM
UNNEST(SPLIT(REPLACE(word, '&#', '0'),';')) value
WHERE
NOT value = '' )),
word) ));
WITH
DATA AS (
SELECT
'Arabic' AS lang,
'https://www.elwatannews.com/news/details/5516935' AS url,
`'تطورات «مذبحة أبو حزام ».. دفن 10 جثث وضبط 19 من عائلتي المجزرة'` AS title)
SELECT
url,
lang,
(
SELECT
STRING_AGG(decode(chars), ''
ORDER BY
OFFSET
)
FROM
UNNEST(REGEXP_EXTRACT_ALL(title, r'(?:&#x.{3};)+|[^&]+')) chars
WITH
OFFSET
) AS translate
FROM
DATA

Answer 1

CREATE TEMP FUNCTION
decode(word string) AS ((
SELECT
IF
(STARTS_WITH(word, '&#x'),
safe.code_points_to_STRING(ARRAY(
SELECT
ifnull(SAFE_CAST(value AS int64),
ASCII(value))
FROM
UNNEST(SPLIT(REPLACE(word, '&#', '0'),';')) value
WHERE
NOT value = '' )),
word) ));
WITH
DATA AS (
SELECT
'Arabic' AS lang,
'https://www.elwatannews.com/news/details/5516935' AS url,
'تطورات «مذبحة أبو حزام ».. دفن 10 جثث وضبط 19 من عائلتي المجزرة' AS title)
SELECT
# url,
lang,
(
SELECT
STRING_AGG(decode(chars), ''
ORDER BY
OFFSET
)
FROM
UNNEST(REGEXP_EXTRACT_ALL(title, r'(?:&#x.{2,3};)+|[^&]+')) chars
WITH
OFFSET
) AS translate
FROM
DATA
with output