How about using this portion of the code where I see a test on country is already captured.
// Use correct name of bank id according to country
$bickey = "BICNumber";
if ($account->getCountryCode() == 'IN') {
$bickey = "SWIFT";
}
Maybe changing it to something like this
// Use correct name of bank id according to country
$bickey = "BICNumber";
if ($account->getCountryCode() == 'IN') {
// Add a blank line/space
$cury += 3; // Adjust this value as needed for the desired space
// Account owner name
$pdf->SetFont('', 'B', $default_font_size - $diffsizecontent);
$pdf->SetXY($curx, $cury);
$pdf->MultiCell(100, 3, $outputlangs->transnoentities("A/C Name").': '.$outputlangs->convToOutputCharset($account->proprio), 0, 'L', 0);
$cury += 4;
// Account Number
$pdf->SetFont('', 'B', $default_font_size - $diffsizecontent);
$pdf->SetXY($curx, $cury);
$pdf->MultiCell(100, 3, $outputlangs->transnoentities("BankAccountNumber").': '.$outputlangs->convToOutputCharset($account->number), 0, 'L', 0);
$cury += 4;
// Bank Name
$pdf->SetFont('', 'B', $default_font_size - $diffsizecontent);
$pdf->SetXY($curx, $cury);
$pdf->MultiCell(100, 3, $outputlangs->transnoentities("Bank").': '.$outputlangs->convToOutputCharset($account->bank), 0, 'L', 0);
$cury += 4;
// Bank IFSC
$pdf->SetFont('', 'B', $default_font_size - $diffsizecontent);
$pdf->SetXY($curx, $cury);
$pdf->MultiCell(100, 3, $outputlangs->transnoentities("IFSC").': '.$outputlangs->convToOutputCharset($account->iban), 0, 'L', 0);
$cury += 4;
// Bank SWIFT
$pdf->SetFont('', 'B', $default_font_size - $diffsizecontent);
$pdf->SetXY($curx, $cury);
$pdf->MultiCell(100, 3, $outputlangs->transnoentities("SWIFT").': '.$outputlangs->convToOutputCharset($account->bic), 0, 'L', 0);
$cury += 4;
}