$customer->{id} = $result->[0]->{id};

    $customer->{name} = decode("utf-8", $result->[0]->{name});

    $customer->{email} = $result->[0]->{email};

    $customer->{points} = $result->[0]->{points};

    $customer->{lang} = $result->[0]->{lang};

    session  customer => $customer;

Later i will need to change the lang value.

How do i change it?

i've tryed
 session ("customer")->{lang} => 'other_value';