Identify and split data in other languages using QGIS

Question

I have a dataset containing names in both English and other languages and mixed too. Is their any way to remove data containing other than English language?

Eg:

Answer 1

You can use regular expressions. I dont know how to in Field Calculator so I use Python.

This doesnt identify language, just the characters a-Z.

See Extracting only characters from a string in Python

import re

#Change these three lines to match your layer and field names
layer = QgsProject.instance().mapLayersByName("plingplong")[0]
field_to_read = "fielda"
field_to_update = "Required N"

fieldindex = layer.fields().indexFromName(field_to_update) #Find the index of the field to update
new_attributes = {} 
pattern = r"(?i)\b[a-z]+\b"
for feature in layer.getFeatures():
    words = ' '.join(re.findall(pattern, feature[field_to_read]))
    #print(words)
    #hello
    #this is a text
    new_attributes[feature.id()]={fieldindex:words}

#new_attributes is now, each features id: {index of field to update: new text} 
#{0: {1: 'hello'}, 1: {1: 'this is a text'}}

layer.dataProvider().changeAttributeValues(new_attributes)

Answer 2

Use regular expressions with Field Calculator. Based on regular expressions \\p{Latin} (to match all latin characters) and \\s (to match whitespaces), use regex_replace() function to delete everything else (see here for details):

regexp_replace ("Actual Name",'([^\\p{Latin}|\\s])','')

This expression keeps latin characters and white spaces from the input and deletes everything else.